Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b815179a5fd6ea6…

MALICIOUS

PDF

62.2 KB Created: 2020-08-16 15:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beac05108dbe1068d008abdc385b344c SHA-1: 5f3fc08ade2d79349d7e2fac9d4fc59f2c9ffc4f SHA-256: 1b815179a5fd6ea66ab87cbcce5923abf86f80586762baebb8d498540b31e22e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a SQL injection password form, aiming to trick users into clicking it. The document also hosts a large number of external PDF links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=sql+injection+password+form
    • http://files.provincev.org/uploads/1/3/1/0/131070216/davamobuxuxetezife.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/mod_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/sebakez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/tolunefitinudulodewi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/apowersoft_screenshot_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/ms_excel_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/kuzon.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/above_and_below_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/96943286865.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2377/files/high_school_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62092070186.pdf
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/wikamapebotijuvapudis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/52000547181.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7c5.bin
15c7512d92ab425e0c7aa7e685426c1f85aef805be860566c67add85bca2ff27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C5 5700 bytes
font_01_sfnt_off0000bb1d.bin
9d4ad25108034ba52787189490f0bb328ae6fb089781565ee0a66a61bd568b50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB1D 15632 bytes

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